Method for protecting a microcomputer system from manipulation of data stored in a memory device of the microcomputer system data

Method for protecting a microcomputer system (30, 33) against manipulation in a memory array (30) of the microcomputer system (30, 33) stored data, particularly for protecting a in the memory array (30) stored program, said Mikrorechner- the system (20, 23) one of the memory device (30) associated with the microcomputer (33) which is for processing the data or the program to the memory device (30) accesses, characterized in that before the use of the memory device (30) to or each associated microcomputer (33) or the memory device (30) an individual identifier is assigned, that depending on the individual identifier, a comparison code is generated and stored in the memory device (30) and that (prior to or during the operation of the microcomputer system 30, 33) generates a security code, depending on the individual identifier (of the microcomputer 33) (to the memory array 30) transmitted in the S peicheranordnung (30) is compared with the comparison code and the memory device (30) is enabled when the security code and the comparison code match.